Biology, 28.07.2019 22:00 jamilecalderonpalaci

Which cranial nerve is responsible for the motor innervation of pharyngeal muscles and parotid salivary glands?

Answers: 2

Show answers

Answers

In general, the pharyngeal muscles are innervated by the pharyngeal branch of the Vagus nerve (CN X). However, the stylopharyngeus muscle is innervated by the glossopharyngeal nerve (CN IX). This specific muscle is involved in swallowing and the CN IX provides the motor innervation for this muscle movement. The parotid salivary glands are also innervated by the glossopharyngeal nerve. It is not possible to separately test the functions of the vagus and glossopharyngeal nerve. This is because the vagus nerve is predominantly controlling the motor function of the larynx and pharynx.

Answer from: locomexicano03

Parasympathetic innervation to the salivary glands is carried via cranial nerves. The parotid gland receives its parasympathetic input from the glossopharyngeal nerve (CN IX) via the otic ganglion, while the submandibular and sublingual glands receive their parasympathetic input from the facial nerve (CN VII) via the submandibular ganglion. These nerves release acetylcholine and substance P, which activate the IP3 and DAG pathways respectively. Direct sympathetic innervation of the salivary glands takes place via preganglionic nerves in the thoracic segments T1-T3 which synapse in the superior cervical ganglion with postganglionic neurons that release norepinephrine, which is then received by β-adrenergic receptors on the acinar and ductal cells of the salivary glands, leading to an increase in cyclic adenosine monophosphate (cAMP) levels and the corresponding increase of saliva secretion. Note that in this regard both parasympathetic and sympathetic stimuli result in an increase in salivary gland secretions.

Answer from: Quest

the correct answer is sex-linked recessive.

i just took the test

Answer from: Quest

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans, squash, amaranth, and chile peppers.

Another question on Biology

Biology, 21.06.2019 20:00

Which of the following matches the organisms described with the correct domain? a. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycanb. archaea--multicellular, eukaryotic organisms that do not have cell wallsc. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sourcesd. bacteria--unicellular, eukaryotic organisms that always lack cell walls

Answers: 1

Answer

Biology, 21.06.2019 23:40

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

Answers: 1

Answer

Biology, 22.06.2019 05:20

Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean

Answers: 2

Answer

Biology, 22.06.2019 10:30

Jason, a dog breeder, decides to mate a poodle with a golden labrador retriever. he wants to get puppies with the curly hair of the poodle and the color of the labrador. what concept is shown in this example? question 6 options: artificial selection adaptation evolution natural selection

Answers: 1

Answer

You know the right answer?

Which cranial nerve is responsible for the motor innervation of pharyngeal muscles and parotid saliv...

Questions